Escapement.



No. 807,261. PATENTED DBO. l2, 1905. A. F. GESOHEIDER.

ESCAPEMENT.

APPLICATION FILED MAYQ. 1905.

UNITED STATES AENT OFFICE.

ALBERT F. GESGHEIDER, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE- 4HALF TOFRANK A. PERSOHN, OF BALTIMORE, MARYLAND.

ESCAPENIENT Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed May 9,1905. Serial No. 259,568.

T0 a/ZZ whom it may concern:

Be it known that I, ALBERT F. GESCHEIDER, a citizen of the United Statesof America, and a resident of Baltimore, in the State of Maryland, haveinvented certain new and useful Improvements in Escapements forSecondary Clocks, of which the following is a full and clearspecification, reference being had to the accompanying drawings, inwhich Figure l is a side elevation with one of the side plates of theframe removed; Fig. f2, a similar view showing the pawls in anotherposition, and Fig. 3 a plan View.

The object'of this invention is to improve and simplify the pawl devicesfor rotating the toothed wheel carried by the minute-hand, as more fullyhereinafter set forth.

To the accomplishment of this object and such others as may hereinafterappear the invention consists of the parts and combination of partshereinafter fully described, and particularly pointed out in theappended claim, reference being' had to the accompanying drawings,forming a part of this specification, in which the same referencecharacters designate like parts throughout the several views.

Referring to the drawings by reference characters, the letter adesignates the usual toothed wheel carried by the minute-hand arbor,which latter is journaled in the usual frame-plates b. J ournaled in theframe-plates above the wheel a in alinement with the axis thereof is ashaft c, to which is rigidly connected the lever CZ, whose outer end isadapted for connection to the usual glycerin pump or pulsometer. Alsorigidly attached to the shaft lc is the pawl-carrying frame, whichconsists of a pair of semicircular plates e, attached to the shaft cupon opposite sides of the lever CZ and braced at their depending endsby the spacingpins f.

Pivotally hung between the plates e are a pair of pawls g g, one beinglocated at each side of the shaft'c. The pawl g extends inwardly andengages the teeth of the wheel a at approximately above the centerthereof, while the pawl g engages the teeth of the wheel at the rightside of the wheel. Both the pawls are held in normal engagement with theteeth-pawl g by its own weight and the pawl g by means of a supplementalweight g2, projecting outwardly to the right at a point about in linewith its pivot. As thus constructed it will be observed that as thelever (Z is vibrated up and down the pawls will alternately engage theteeth of the wheel and rotate it the distance of one tooth to the rightwith each pulsation of the. pump. To prevent the wheel moving more thanthe distance of one tooth with each pulsation, I provide each of thepawls with a depending lock-finger g3, which when the pawl is inworking' engagementwith one of the teeth of the wheel will positivelyengage another tooth to the rear of the one in engagement and positivelylock the wheel against further rotation. This alternate positive lockingaction is shown clearly in Figs. l and 2, the pawl g being in action inFig. l and the pawl g being in action in Fig. 2. The pawl not in actionis obviously simply in loose engagement with the wheel with itslock-linger swung away from the wheel. It will be observed that therelative angle of the pawl and its loch-linger must be such that theyengage the opposing faces of two of the teeth of the wheel and press inopposite directions against the same, as shown, so that lost motionshall be entirely eliminated and the device rendered reliable in thehighest practicable degree.

It will be apparent to those skilled in the art that various mechanicalembodiments of the invention are possible, and I therefore do not wishto be limited to the exact arrangement and construction shown.

That I claim, and desire to secure by Letters Patent, is-

In a device of the class described, the combination of a frame, a wheelcarried by a shaft journaled in the frame, a rocking pawl-carrying framemounted over the wheel and means for rocking this frame, and a pair ofpawls carried by this frame and pivotally depending` therefrom andnormally resting in engagement with the teeth of the wheel, one pawldisposed at each side of the axis of movement of the pawl-carrying frameand each pawl being provided with a locking-finger which is adapted toengage a tooth of the wheel when its pawl is in working engagement withthe wheel, substantially as set forth.

In testimony whereof I hereunto affix my signature, in the presence oftwo witnesses, this 3d day of May, 1905.

ALBERT F. GESCHEIDER.

Witnesses:

FRANK A. PnnsonN, EDWIN C. CoLLINs.

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